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test/functional/abc-p2p-compactblocks.py
| Show First 20 Lines • Show All 120 Lines • ▼ Show 20 Lines | def next_block(self, number, spend=None, script=CScript([OP_TRUE]), block_size=0, extra_txns=0): | ||||
| assert_equal(block_size, 0) | assert_equal(block_size, 0) | ||||
| block = create_block(base_block_hash, coinbase, block_time) | block = create_block(base_block_hash, coinbase, block_time) | ||||
| else: | else: | ||||
| # all but one satoshi to fees | # all but one satoshi to fees | ||||
| coinbase.vout[0].nValue += spend.tx.vout[spend.n].nValue - 1 | coinbase.vout[0].nValue += spend.tx.vout[spend.n].nValue - 1 | ||||
| coinbase.rehash() | coinbase.rehash() | ||||
| block = create_block(base_block_hash, coinbase, block_time) | block = create_block(base_block_hash, coinbase, block_time) | ||||
| # Make sure we have plenty engough to spend going forward. | # Make sure we have plenty enough to spend going forward. | ||||
| spendable_outputs = deque([spend]) | spendable_outputs = deque([spend]) | ||||
| def get_base_transaction(): | def get_base_transaction(): | ||||
| # Create the new transaction | # Create the new transaction | ||||
| tx = CTransaction() | tx = CTransaction() | ||||
| # Spend from one of the spendable outputs | # Spend from one of the spendable outputs | ||||
| spend = spendable_outputs.popleft() | spend = spendable_outputs.popleft() | ||||
| tx.vin.append(CTxIn(COutPoint(spend.tx.sha256, spend.n))) | tx.vin.append(CTxIn(COutPoint(spend.tx.sha256, spend.n))) | ||||
| # Add spendable outputs | # Add spendable outputs | ||||
| for i in range(4): | for i in range(4): | ||||
| tx.vout.append(CTxOut(0, CScript([OP_TRUE]))) | tx.vout.append(CTxOut(0, CScript([OP_TRUE]))) | ||||
| spendable_outputs.append(PreviousSpendableOutput(tx, i)) | spendable_outputs.append(PreviousSpendableOutput(tx, i)) | ||||
| pad_tx(tx) | |||||
| return tx | return tx | ||||
| tx = get_base_transaction() | tx = get_base_transaction() | ||||
| # Make it the same format as transaction added for padding and save the size. | # Make it the same format as transaction added for padding and save the size. | ||||
| # It's missing the padding output, so we add a constant to account for it. | # It's missing the padding output, so we add a constant to account for it. | ||||
| tx.rehash() | tx.rehash() | ||||
| base_tx_size = len(tx.serialize()) + 18 | base_tx_size = len(tx.serialize()) + 18 | ||||
| Show All 11 Lines | def next_block(self, number, spend=None, script=CScript([OP_TRUE]), block_size=0, extra_txns=0): | ||||
| # Add transaction until we reach the expected transaction count | # Add transaction until we reach the expected transaction count | ||||
| for _ in range(extra_txns): | for _ in range(extra_txns): | ||||
| self.add_transactions_to_block(block, [get_base_transaction()]) | self.add_transactions_to_block(block, [get_base_transaction()]) | ||||
| # If we have a block size requirement, just fill | # If we have a block size requirement, just fill | ||||
| # the block until we get there | # the block until we get there | ||||
| current_block_size = len(block.serialize()) | current_block_size = len(block.serialize()) | ||||
| overage_bytes = 0 | |||||
| while current_block_size < block_size: | while current_block_size < block_size: | ||||
| # We will add a new transaction. That means the size of | # We will add a new transaction. That means the size of | ||||
| # the field enumerating how many transaction go in the block | # the field enumerating how many transaction go in the block | ||||
| # may change. | # may change. | ||||
| current_block_size -= len(ser_compact_size(len(block.vtx))) | current_block_size -= len(ser_compact_size(len(block.vtx))) | ||||
| current_block_size += len(ser_compact_size(len(block.vtx) + 1)) | current_block_size += len(ser_compact_size(len(block.vtx) + 1)) | ||||
| # Add padding to fill the block. | |||||
| left_to_fill = block_size - current_block_size | |||||
| # Don't go over the 1 mb limit for a txn | |||||
| if left_to_fill > 500000: | |||||
| # Make sure we eat up non-divisible by 100 amounts quickly | |||||
| # Also keep transaction less than 1 MB | |||||
| left_to_fill = 500000 + left_to_fill % 100 | |||||
| # Create the new transaction | # Create the new transaction | ||||
| tx = get_base_transaction() | tx = get_base_transaction() | ||||
| pad_tx(tx, left_to_fill - overage_bytes) | |||||
| # Add padding to fill the block. | if len(tx.serialize()) + current_block_size > block_size: | ||||
| script_length = block_size - current_block_size - base_tx_size | # Our padding was too big try again | ||||
| if script_length > 510000: | overage_bytes += 1 | ||||
| if script_length < 1000000: | continue | ||||
| # Make sure we don't find ourselves in a position where we | |||||
| # need to generate a transaction smaller than what we expected. | |||||
| script_length = script_length // 2 | |||||
| else: | |||||
| script_length = 500000 | |||||
| script_output = CScript([b'\x00' * script_length]) | |||||
| tx.vout.append(CTxOut(0, script_output)) | |||||
| # Add the tx to the list of transactions to be included | # Add the tx to the list of transactions to be included | ||||
| # in the block. | # in the block. | ||||
| self.add_transactions_to_block(block, [tx]) | self.add_transactions_to_block(block, [tx]) | ||||
| current_block_size += len(tx.serialize()) | current_block_size += len(tx.serialize()) | ||||
| # Now that we added a bunch of transaction, we need to recompute | # Now that we added a bunch of transaction, we need to recompute | ||||
| # the merkle root. | # the merkle root. | ||||
| ▲ Show 20 Lines • Show All 157 Lines • Show Last 20 Lines | |||||